Instruction manual

Appendix A – DGX Configuration Software
166
Instruction Manual – Enova DGX 8/16/32 Digital Media Switchers
EDID Programmer View
From the EDID Programmer view, EDID EEPROM chips on each of the DGX HDMI and DGX DVI
Input Board connectors can be re-programmed independently if necessary.
EDID Overview
EDID (Extended Display Identification Data) is a data structure established by the Video Electronics
Standards Association (VESA) to enable plug-and-play support by enabling easy configuration of a
computer’s graphics subsystem based on the capabilities of the attached display device.
EDID information includes items such as the following:
Manufacturer’s name
Product type
Supported video resolutions and refresh rates
Color space and filter chromaticity
Detailed timings
When a computer is directly connected to a display device, it can use the display device’s EDID
information to determine an initial compatible video signal to send. With the computer’s display
controls, the user can modify this selection to another compatible signal based on the provided EDID
information.
With DVI and HDMI signals (both require EDID on the display devices), using EDID information has
extended beyond computers to other source devices, such as DVD players. As long as the source device
sends a compatible signal, the plug-and-play feature will work.
Digital Media Switchers and EDID
Digital Media Switchers, such as the Enova DGX, provide the ability to route one source signal to many
potentially different types of display devices. In almost all cases through the use of compatible DXLink
Receivers or DGX SC Fiber Receivers (both featuring SmartScale Technology), incompatibilities
between source device resolutions and displays are automatically resolved as each receiver
independently scales each source device’s video to the display’s native resolution.
In cases where local DVI or HDMI outputs are used and a resolution incompatibility exists (or if a
source device needs a specific resolution), the DGX DVI and DGX HDMI Input Boards have the ability
to update the EDID emulation file (by updating each input’s EEPROM chip) which comes pre-loaded
with an AMX AutoPatch EDID set.
This EDID set consists of some of the most common EDID settings in use today, including VESA and
HDTV settings encompassing resolutions for Standard Timings and resolutions for Established Timings
(for HDMI timing details, see page 66; for DVI, see page 76). In many cases, the switcher can be used
straight out of the box with no adjustments (see “Determining the Need for EDID Re-programming” on
page 167).
The DGX Configuration Software with EDID programming functionality has been provided for cases
where additional in-field programming of a board’s input connectors EDID chips is needed. The EDID
Programmer view can be used for the following:
Reading and saving EDID data in hexadecimal from an output receiving the information from
its attached destination device.
Writing EDID data to the Enova DGX input connector’s associated EDID EEPROM.
Important: Any analysis or editing of the EDID data necessary to support the equipment specific to
the installation will need to be done separately prior
to using the EDID Programmer view. A variety of
freeware tools can be found on the Internet to help with these tasks.